Olsok

thumb|upright|The cross of flowers – the armorial of [[Verdal Municipality – at Stiklestad during Olsok in July 2013.]] thumbnail|Olav den hellige stumps at the [[Battle of Stiklestad.]] Olsok () is a national day of celebration on July 29 in the Nordic countries of Norway and the Faroe Islands, and also in the provinces of Härjedalen in Sweden and Savonlinna in Finland.

==Background== King Olaf II Haraldsson of Norway is remembered as Rex perpetuus Norvegiae, the Eternal King of Norway. July 29 is traditionally the date of the death of King Olaf at the Battle of Stiklestad, north of Nidaros (Trondheim), Norway, in 1030. King Olaf's martyrdom at Stiklestad appears to have contributed decisively to establishing Christianity throughout the nation of Norway. King Olaf was subsequently canonized in Nidaros on 3 August 1031 following efforts principally of north Bishop Grimkell.